DPMSInfo(3) X FUNCTIONS DPMSInfo(3)

DPMSInfo - returns information about the current DPMS state

cc [ flag ... ] file ... -lXext [ library ... ]
#include <X11/extensions/dpms.h>
Status DPMSInfo
(
      Display *display,
      CARD16 *power_level,
      BOOL *state
);

display
Specifies the connection to the X server
power_level
Specifies the current power level
state
Specifies the current DPMS state

The DPMSInfo function returns information about the current Display Power Management Signaling (DPMS) state. The state return parameter indicates whether or not DPMS is enabled (TRUE) or disabled (FALSE). The power_level return parameter indicates the current power level (one of DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff.)

TRUE
The DPMSInfo function returns TRUE, if values are returned.
FALSE
The DPMSInfo function returns FALSE, if no values are returned.

DPMSEnable(3)
libXext 1.3.4 X Version 11